/**
 * Copyright 2024 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import { AbstractControl, ValidationErrors, ValidatorFn } from '@angular/forms';

export function RegexValidator(): ValidatorFn {
  return (control: AbstractControl): ValidationErrors | null => {
    try {
      new RegExp(control.value);
    } catch (e) {
      return { regex: e };
    }
    return null;
  };
}
